[LLVMdev] [PATCH] BlocksRuntime updates for Linux

[Shantonu Sen]

The attached diff cleans up the BlocksRuntime/ directory of compiler- 
rt for better portability, eliminates compiler warnings, and adds  
support to the cmake build to install the results.

More specifically, the changes:
1) Remove cmake-specific #define usage from the exported Block.h/ 
Block_private.h headers, since clients won't know what to set. These  
are moved into runtime.c as appropriate
2) Use cmake checks for CAS builtins, instead of guessing based on GCC  
#defines (which aren't set by clang and llvm-gcc anyway)
3) "#pragma mark" isn't supported by FSF gcc, so "#if 0" it out. It  
should still show up in IDEs that support it
4) Fix some compiler warnings. GCC 4.3.3 seems super strict about %p.  
function pointers can't be cast to void * either.
5) Avoid a warning for apple_versioning.c that "ISO C does not allow  
empty files"

Tested on Ubuntu Linux 9.04 with clang and llvm-gcc and -fblocks to  
define and copy some blocks (and invoke them, obviously). Also tested  
on Mac OS X 10.6 and linking against -lBlocksRuntime ahead of -lSystem.

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Shantonu Sen
ssen at apple.com

Sent from my Mac Pro